Language death and language maintenance : theoretical, practical and descriptive approaches / ed. by Mark Janse, Sijmen Tol ; with the assistance of Vincent HendriksLinguistic bibliography online / ed. by Sijmen Tol and Hella Olbertz on the authority of the Comité international permanent de linguistes under the auspices of the International Council for Philosophy and Humanistic Studies of UNESCOBibliographie linguistique de l'annee 1999 = Linguistic bibliography for the year 1999 : et complements des annees precedentes = and supplements for previous years / edited by Mark Janse, Hella Olbertz, Sijmen TolOud water nieuwe buren : communiceren / [eindred. Stefan Ouboter, Sijmen Tol, Kristel Braunius ; red. Sijmen Tol]Linguistic Bibliography for the Year 2002 = Bibliographie Linguistique de l'Année 2002 : And supplement for previous year = et complément des années précédentes / ed. by. Sijmen Tol, Hella OlbertzLinguistic bibliography for the year 2004 : and supplement for previous years = Bibliographie linguistique de l'année 2004 : et complement des années précédentes / edited by Sijmen Tol and Hella OlbertzLinguistic bibliography for the years 2005-2008 = Bibliographie linguistique des années 2005-2008 / edited by Sijmen Tol and Hella OlbertzLinguistic bibliography for the years 2009 = Bibliographie linguistique des années 2009 / edited by Sijmen Tol and Hella OlbertzLinguistic bibliography for the year 2010 = Bibliographie linguistique des année 2010 / edited by Sijmen Tol and Hella OlbertzBibliography of Slavic linguistics, 2000-2014 / edited by Sijmen Tol and René Genis ; with the assistance of Ekaterina Bobyleva and Eline van der Veken ; introduction by Marc L. GreenbergBibliography of Slavic linguistics, 2000-2014 / edited by Sijmen Tol and René Genis ; with the assistance of Ekaterina Bobyleva and Eline van der Veken ; introduction by Marc L. GreenbergGeschiedenis van het marxisme / Leszek Kołakowski